Has anyone tried the Helicon Focus software? It's a stand alone program that takes in focus slices of your photos, and combines them into a single image with a greater depth of field. It's kind of like HDR for DOF. I have heard about it before, but never looked into it. I read about it again today in the newest issue of Outdoor Photographer so I thought I would look it up and see what it's all about. I downloaded the free 30 day trial, and started to play around with it. I have only done a couple of tests with it so far, but it seems to do the trick pretty well.
Helicon also has a software called Helicon Filter. From what little I read about it, it's a stand alone image processing tool. They have a free version if anyone is looking for an image processing tool.
Here is a series of 4 photos I took using my 100mm f/2.8 macro lens, set at f/8. I adjusted the plane of focus a little bit for each image, them combined them using the Helicon Focus software to get an image with a DOF from front to back.